Acoustic Echo Canceler Wideband (AEC WB)

Traditional 8kHz AEC consumes too many memory and CPU resources and still cant be practically used in multimedia gadgets which mostly have ARM-like processor with small internal cache and low-speed memory to keep power consumption as small as possible. Everybody knows that wide band VoIP is progressive technology and voice being sampled at 16kHz sounds very native and clear. Taking into account memory and performance restrictions of mobile processors nobody expects to see true acoustic echo cancellation there. All known gadgets have been using simplified narrow band AEC-like ad-hoc  technics to suppress echo somehow and, of course, it works awful – unsuppressed echo, audible distortions and musical noise make hands-free communication uncomfortable.

Fortunately there is a good solution bringing true wide band quality in mobile and hand-held devices. IntegrIT has developed nonlinear wide-band acoustic echo canceler IntegrIT AEC WB, based on proprietary IntegrIT CrystalSpeech technology. IntegrIT AEC WB is especially suitable for small communication devices with limited resources. It can work in both narrow/wide band modes and consumes minimum resources to fit in mobile processors. IntegrIT AEC WB works reliably in wide range of environmental conditions and insensitive to many dynamic impacts.

Features of IntegrIT Acoustic Echo Canceller Wideband:

• Wide band voice representation at 16kHz sampling rate returning true 8kHz voice bandwidth.
• Variable echo path in range 64-512msec.
• Computationally light so it can be used in video conferencing even on portable devices.
• Consumes less data memory and therefore minimizes memory read/write operations, cache misses and stall cycles due to cache invalidation.
• Insensitive to synchronization between playback and recording paths.
• Insensitive to audio path non-linearity.
• Integrated noise suppression and automatic gain control functions enable communications even in very noisy places
• Perfectly integrated with wide band vocoders G711.1, G729.1, G722 and AMR WB.
• Support dynamic switching in narrow band (8kHz) mode.
• Ready for usage in Android, iOS, Symbian smart phones.
• Several profiles for various environments: HEADSET, OFFICE, HALL, STREET, CAR